During the M&G, I will let owners know that, while I am home most of the time, I may have to leave to run errands, etc. I tell them that their dog will not be left alone for more than three hours, except for unusual commitments of which I will specifically inform the owner. If I don't know the dog, it will not be left alone during the first 24 hours, at a minimum. I need to establish how they behave in my home and with my own dog. Since I do not have crates or kennels, I might employ baby gates to physically separate dogs or restrict their movement. Generally dogs are allowed to roam the first floor of my home.
The most important thing is the dog's safety and communication with the owner about care you will provide their dog. Remember, in going with a Rover sitter, the client has chosen a "home" solution rather than a commercial kennel or boarding facility with a 24/7 staff. There are pros and cons with each, but in a home environment, with one caretaker, realistically speaking, that caregiver might need to go out. Usually this isn't an issue for my clients or their dogs.
Namasté, Live your life normally, if their is a issue report it to Rover/the owner. I keep my rules strict so I can try to get responsible dog owners as clients. Also I keep my rates a little higher to ensure I get responsible owners. If you do stay home the entire stay, charge more an state it.